Question

give 8 methods to preserve food

Answer 1

8 Simple Food Preservation Methods are as follows: 

1. Fermentation
2. Acidification
3.Drying Food 
4. Root Cellaring
5.Home Canning
6.Freezing Food
7.Refrigerating and Freezing Food
8. bottling and preserving

Hope this helps u.. 

Answer 2

some of the way of food presevation-
1) by using special chemical
2) preservation by sugar
3) preservation by oil and vinegar
4) preservation by common salt
5) hot and cold treatment
6) drying n dehydration
7) pasteurisation
8) proper storage and packaging